[F-FT] RMS delay question/comment

Is that to get caught mislabling them or to certify?

Reply to
Phil Stein
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I have suggested Gary put this paragraph in an obscure place on his website so newbies are not encouraged to work above their skill level, and so experienced folks are compliant.

I am thinking the public reply he made earlier today to rmr "endorsing" it has the same force and effect if it is commonly recognized he endorsed it.

Jerry

Reply to
Jerry Irvine

Reply to
Jeff Taylor

I was think the adjustable delays and I really like the J528. - hope that's the right number

In that other message, were you saying that the motors don't need recert to change to the 1-30 sec delay or did I misunderstand?

Do you have any details of future stuff you'd like to elaborate on?

Reply to
Phil Stein

-----snip-----

Surely Wallaby skins would make a better parachute ?

John

Reply to
John Bonnett

I jsut did. I'll have them posted within the hour...

Bob Kaplow NAR # 18L TRA # "Impeach the TRA BoD" >>> To reply, remove the TRABoD!

Reply to
Bob Kaplow

No, no, no, no.......!!!! Their skins are used for recovery wadding and motor insulation....

With a live glider I "Almost" have a complete guidance system for the trip back to earth....... Thing is the bugger runs on Auto and is known for computer (Brain) glitches....!!! Who knows where he'd end up??? Probably in the next tree....

Reply to
CJC

Since the SynerJet tool keeps coming up, and has been OOP for about 15 years, no one knows what they look like. Here are a couple photos of mine:

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The first one shows the "Field Ranger" tool next to a AA battery for scale. It's adjusted to trim 6 seconds off a delay, which meand the drill bit protrudes 6/32 of an inch.

The second photo shows uthe unit disassembled, with the drill portion lying flat, and the brass tube standing up showing where the drill screws in.

IMHO this is a BRILLIANT design because it is so simple.

The outer tube is a piece of 1/2" x 2.2" K&S brass tube (it needs to be just a tad longer than the drill bit length). Inside it are 2 slugs of 1/4" or so thick aluminum rod. One end is center drilled just oversize (7/64) for the

3/32 drill bit that is used to cut the delay. The other end is tapped for an 8/32 thread. THe two ends are either pressed or glued into place.

The inner piece is an 8/32 x 2" thumbscrew, center drilled and a 3/32 drill bit is epoxied in the end. Over the thumbscrew is a knurlled brass terminal lug (I remember these on the ends of my train and slot car power supply transformers, in slightly smaller sizes) and a #8 washer. That's it!

To use, you thread the drill bit / thunbscrew into the threaded end of the sleeve, and then twist the thumbscrew until the bit is just flush with the end of the sleeve (do this on a table and it's easy - or if you're shortening an already drilled delay, turn the thumbscrew until it bottoms out in the existing hole). Now here's the magic part. Turn the thumbscrew one full turn for each second you want to remove! Since the thread is 32 TPI each turn is one second. Now screw down the brass lug to hold it tight. You now have a drill bit exactly the right length to drill your delay.

Reminder/disclaimer: Any motor modified with a tool like this is no longer a "model rocket" motor. It can not be flown at any NAR or TRA launch. And it may be illegal in your state. YMMV.

Back in the days of finiky Apogee BP motors, I made a similar Thumbscrew-1/16" bit tool without the sleeve for cleaning out the nozzles. I still keep it in my range box, as the problem seems to have returned with some E9s.

Bob Kaplow NAR # 18L TRA # "Impeach the TRA BoD" >>> To reply, remove the TRABoD!

Reply to
Bob Kaplow

Done! See my previous post!

Bob Kaplow NAR # 18L TRA # "Impeach the TRA BoD" >>> To reply, remove the TRABoD!

Reply to
Bob Kaplow

How about some ModRoc sized Loki's?

I could use some D's through G's....

Reply to
Thomas Koszuta

Not at any launch I've ever been to.

It could be argued that it's still an H128-10, since that's the motor's official designation, and you're still using the orginal components including the delay element. It's just a drilled (modified, whatever) H128-10.

That said, if I was ever at a launch where I knew the folks were sticklers about such things, I would respect the rights of the launch organizers and not use a motor with a drilled delay.

.
Reply to
raydunakin

There are no additional barriers here that I'm aware, at least for purchasing F-G motors. If you're talking about locating approved launch sites (in this or any other state), I tend to think of that as a separate issue, and definitely one that is almost completely outside the control of the national orgs. It's just too political.

BTW, as far as launch sites go, we have it both worse and better than some states. On the one hand, it's very difficult to find anyplace to legally launch rockets in or near metropolitan areas. On the other hand, we've got millions of acres of open desert where you can do darn near anything. So if you have a car and don't mind driving a couple hours to fly rockets, it's great. If you're a kid with no transportation who just wants to go down the street and pop off a few modrocs, you're out of luck.

Reply to
raydunakin

The SynerJet delay tool works just fine. The reason it uses a narrow bit is so that it can be used on single-use motors as well as reloadables.

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Reply to
raydunakin

On mine, one rounded end of the thumbscrew has been ground off, making it easier to keep track of how many turns you've made when adjusting it.

Reply to
raydunakin

They sound convinced they need 4x the labor for 1/4 the cash with 8x the capital cost.

For a rapidly diminishing market.

Jerry

Reply to
Jerry Irvine

Nobody comments in detail on unreleased products. That's why they call them unreleased.

Jerry

Reply to
Jerry Irvine

You are clueless.

Reply to
Jerry Irvine

In article snipped-for-privacy@corp.supernews.com, Jerry Irvine at snipped-for-privacy@gte.net wrote on 4/7/05 10:28 PM:

I've probably said too much already.

Gary/RCS

Reply to
Gary C. Rosenfield

You will find it necessary to filter Phil Stein.

I am just glad we could have a helpful and positive conversation on a topic we are both excited about.

Jerry

Reply to
Jerry Irvine

In article snipped-for-privacy@g14g2000cwa.googlegroups.com, snipped-for-privacy@aol.com at snipped-for-privacy@aol.com wrote on 4/7/05 6:30 PM:

Here are a few:

  1. More difficult to enter distribution channels
  2. Greater capitalization compared to HPR
  3. Generally lower margins (higher discounts expected)
  4. Manufacturing usually more dependent upon mass production techniques to be efficient

Gary/RCS

Reply to
Gary C. Rosenfield

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